// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_VIEWS_CONTROLS_MESSAGE_BOX_VIEW_H_
#define UI_VIEWS_CONTROLS_MESSAGE_BOX_VIEW_H_

#include <stdint.h>

#include <vector>

#include "base/macros.h"
#include "base/strings/string16.h"
#include "ui/views/view.h"

namespace views {

class Checkbox;
class Label;
class Link;
class LinkListener;
class Textfield;

// This class displays the contents of a message box. It is intended for use
// within a constrained window, and has options for a message, prompt, OK
// and Cancel buttons.
class VIEWS_EXPORT MessageBoxView : public View {
public:
    // Internal class name.
    static const char kViewClassName[];

    enum Options {
        NO_OPTIONS = 0,
        // For a message from a web page (not from Chrome's UI), such as script
        // dialog text, each paragraph's directionality is auto-detected using the
        // directionality of the paragraph's first strong character's. Please refer
        // to HTML5 spec for details.
        // http://dev.w3.org/html5/spec/Overview.html#text-rendered-in-native-user-interfaces:
        // The spec does not say anything about alignment. And we choose to
        // align all paragraphs according to the direction of the first paragraph.
        DETECT_DIRECTIONALITY = 1 << 0,
        HAS_PROMPT_FIELD = 1 << 1,
    };

    struct VIEWS_EXPORT InitParams {
        explicit InitParams(const base::string16& message);
        ~InitParams();

        uint16_t options;
        base::string16 message;
        base::string16 default_prompt;
        int message_width;
        int inter_row_vertical_spacing;
    };

    explicit MessageBoxView(const InitParams& params);

    ~MessageBoxView() override;

    // Returns the text box.
    views::Textfield* text_box() { return prompt_field_; }

    // Returns user entered data in the prompt field.
    base::string16 GetInputText();

    // Returns true if a checkbox is selected, false otherwise. (And false if
    // the message box has no checkbox.)
    bool IsCheckBoxSelected();

    // Adds a checkbox with the specified label to the message box if this is the
    // first call. Otherwise, it changes the label of the current checkbox. To
    // start, the message box has no checkbox until this function is called.
    void SetCheckBoxLabel(const base::string16& label);

    // Sets the state of the check-box.
    void SetCheckBoxSelected(bool selected);

    // Sets the text and the listener of the link. If |text| is empty, the link
    // is removed.
    void SetLink(const base::string16& text, LinkListener* listener);

    // View:
    void GetAccessibleState(ui::AXViewState* state) override;

protected:
    // View:
    void ViewHierarchyChanged(
        const ViewHierarchyChangedDetails& details) override;
    // Handles Ctrl-C and writes the message in the system clipboard.
    bool AcceleratorPressed(const ui::Accelerator& accelerator) override;
    const char* GetClassName() const override;

private:
    // Sets up the layout manager and initializes the message labels and prompt
    // field. This should only be called once, from the constructor.
    void Init(const InitParams& params);

    // Sets up the layout manager based on currently initialized views. Should be
    // called when a view is initialized or changed.
    void ResetLayoutManager();

    // Message for the message box.
    std::vector<Label*> message_labels_;

    // Input text field for the message box.
    Textfield* prompt_field_;

    // Checkbox for the message box.
    Checkbox* checkbox_;

    // Link displayed at the bottom of the view.
    Link* link_;

    // Maximum width of the message label.
    int message_width_;

    // Spacing between rows in the grid layout.
    int inter_row_vertical_spacing_;

    DISALLOW_COPY_AND_ASSIGN(MessageBoxView);
};

} // namespace views

#endif // UI_VIEWS_CONTROLS_MESSAGE_BOX_VIEW_H_
